Functional vomiting, cyclic vomiting syndrome and chronic idiopathic nausea are fairly rare but highly disabling disorders. Although there is a dearth of randomized, controlled treatment trials for these disorders, interest in their etiology and treatment is increasing. In this Review, the authors consider the nomenclature, pathophysiology, clinical presentation and management of these functional gastroduodenal disorders, with a particular focus on cyclic vomiting syndrome.
- Kevin W Olden
- Pavan Chepyala
